# You asked: How do I change the RPM on my AC motor?

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## How do I lower the RPM on my AC motor?

1) Simply add a resistor in series. This will drop the voltage supplied, but likely increase current draw on the windings? When driving a fan with a shaded pole or permanent split capacitor (PSC) motor a variable resistor is the simplest way to reduce speed.

## How do you control the speed of an AC motor?

The Variable Frequency Drive is a particular kind of adjustable-speed drive that is used to control the speed of an AC motor. In order to control the motor’s rotational speed, a Variable Frequency Drive controls the frequency of the electrical power supplied to it.

## How do you control the RPM of a single phase AC motor?

SINGLE- PHASE AC MOTOR SPEED CONTROLS

The two primary ways to control the speed of a single-phase AC motor is to either change the frequency of the line voltage the motor sees or by changing the voltage seen by the motor, thereby changing the rotational speed of the motor.

## Can you make a AC motor variable speed?

Variable speed requirements for AC induction motors are typically fulfilled by a 3-phase motor and an inverter or VFD. … At 60 Hz, the motor will run at 1800 RPM. A variable frequency drive controls the motor speed by using PWM (Pulse Width Modulation) to alter the power supply frequency that’s fed to the motor.

## How can you reduce the rpm of a motor with a pulley?

Add half of the diameter of each pulley to twice the shaft-center-to-shaft-center distance. Get the next larger standard size of belt. Install the belt on the pulleys and move the units apart until the belt has a slack of about 1/2 inch.

## How do I slow down my motor speed?

So, if you want to decrease speed, decrease voltage. If you want to decrease torque, decrease current. If you increase torque (say by putting a brake on the motor), you are increasing motor torque. But if you don’t change the supply of electrical power, then the mechanical power also won’t change.

## How do you increase the speed of an AC motor?

As several people have already stated, it is possible to increase the speed of an ac motor by increasing the input frequency to the motor. This is done in industry by adding a variable frequency drive.

## How do you increase the RPM of a pulley on an AC motor?

You can change the pulley on the blower drive motor to increase or decrease the blower speed. The set screw that holds the pulley to the driveshaft needs to be loosened. Move the pulley on the shaft one turn at a time.

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## Can you speed control a single phase motor?

Speed control of single-phase induction motors is desirable in most motor control applications since it not only provides variable speed but also reduces energy consumption and audible noise. … Using microcontroller-based control systems, one can add speed variation to the system.

## Can you use a dimmer switch to control a motor?

Dimmer Switch for Fan Speed

The best dimmers for running an electric motor have an adjustable minimum speed setting. … Always buy a switch that is rated to handle an equal amount for the watts or more, not less, in order for the dimmer switch to work well. A dimmer motor AC switch is suitable for a ceiling fan.

## Can I use a potentiometer to control AC motor speed?

If you mean that you want to control the speed of an AC fan with a potentiometer, it is probably not possible. Whether an AC “mains” fan can be speed controlled with a pot depends on the technology used. Single phase induction motor – capacitor start usually.